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Method for correcting seismic data for receiver movement during data acquisition

a receiver movement and seismic data technology, applied in seismology, seismology, instruments, etc., can solve the problem that seismic energy can take several seconds to travel through the water

Inactive Publication Date: 2006-04-18
PGS AMERICA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach enhances the accuracy of seismic data interpretation by correctly accounting for sensor movement in both directions, improving the precision of subsurface structure and composition analysis.

Problems solved by technology

However, seismic energy can take several seconds to travel through the water, through the subsurface earth formations, reflect upwardly and travel back through the formations, the water and to the seismic sensors.
A limitation of the methods disclosed in the foregoing references is that they only account for movement of the sensors as being directly related to the velocity of the seismic vessel.

Method used

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  • Method for correcting seismic data for receiver movement during data acquisition
  • Method for correcting seismic data for receiver movement during data acquisition
  • Method for correcting seismic data for receiver movement during data acquisition

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Embodiment Construction

[0023]An example of marine seismic data acquisition techniques that can be used with embodiments of a method according to the invention is shown in FIG. 1. A first seismic vessel 10 includes signal recording, source control and navigation systems, shown generally at 12 and referred to for convenience as the “recording system.” The recording system 12 may include devices (not shown separately) to control actuation of a seismic energy source 14 that is towed in the water 11 by the first vessel 10. The source 14 may be an air gun, air gun array, water gun or any other type of seismic energy source known in the art for marine seismic surveying. It should be noted that the invention will produce the best results when impulsive type sources are used. Other implementations of seismic data acquisition may include more than one seismic energy source. The number of seismic energy sources, the type of source and the position of any seismic energy source with respect to the first seismic vessel...

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Abstract

A method is disclosed for processing seismic data. The method includes determining a position of a seismic energy source and seismic receivers at a time of actuation of the source. A velocity of the seismic receivers with respect to the source position is determined at the time of actuation. An offset of the receivers is corrected using the velocity. A moveout correction is determined for the signals detected by the sensors based on the corrected offset and a velocity of earth media through which seismic energy passed from the source to the sensors.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]Not applicable.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not applicable.BACKGROUND OF THE INVENTION[0003]1. Field of the Invention[0004]The invention relates generally to the field of marine seismic data acquisition and interpretation. More specifically, the invention relates to methods for correcting marine seismic data for the effects of receiver movement during data recording after actuation of a seismic energy source.[0005]2. Background Art[0006]Seismic surveying is used to evaluate structures of, compositions of, and fluid content of subsurface earth formations. A particular application for seismic surveying is to infer the presence of useful materials, such as petroleum, in the subsurface earth formations. Generally, seismic surveying includes deploying an array of seismic sensors at or near the earth's surface, and deploying a seismic energy source near the sensors also at or near the surface. The seismic...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G01V1/38G01VG01V1/28G01V1/36G06F17/40
CPCG01V1/362G01V1/38G01V2210/52G01V1/28G06F17/40
Inventor KINKEAD, JACK DEWAYNE
Owner PGS AMERICA INC
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